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|
//+build notmuch
package notmuch
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"git.sr.ht/~sircmpwn/aerc/models"
"git.sr.ht/~sircmpwn/aerc/worker/lib"
"github.com/emersion/go-message"
_ "github.com/emersion/go-message/charset"
notmuch "github.com/zenhack/go.notmuch"
)
type Message struct {
uid uint32
key string
msg *notmuch.Message
rwDB func() (*notmuch.DB, error) // used to open a db for writing
refresh func(*Message) error // called after msg modification
}
// NewReader reads a message into memory and returns an io.Reader for it.
func (m *Message) NewReader() (io.Reader, error) {
f, err := os.Open(m.msg.Filename())
if err != nil {
return nil, err
}
defer f.Close()
b, err := ioutil.ReadAll(f)
if err != nil {
return nil, err
}
return bytes.NewReader(b), nil
}
// MessageInfo populates a models.MessageInfo struct for the message.
func (m *Message) MessageInfo() (*models.MessageInfo, error) {
return lib.MessageInfo(m)
}
// NewBodyPartReader creates a new io.Reader for the requested body part(s) of
// the message.
func (m *Message) NewBodyPartReader(requestedParts []int) (io.Reader, error) {
f, err := os.Open(m.msg.Filename())
if err != nil {
return nil, err
}
defer f.Close()
msg, err := message.Read(f)
if err != nil {
return nil, fmt.Errorf("could not read message: %v", err)
}
return lib.FetchEntityPartReader(msg, requestedParts)
}
// MarkRead either adds or removes the maildir.FlagSeen flag from the message.
func (m *Message) MarkRead(seen bool) error {
haveUnread := false
for _, t := range m.tags() {
if t == "unread" {
haveUnread = true
break
}
}
if (haveUnread && !seen) || (!haveUnread && seen) {
// we already have the desired state
return nil
}
if haveUnread {
err := m.RemoveTag("unread")
if err != nil {
return err
}
return nil
}
err := m.AddTag("unread")
if err != nil {
return err
}
return nil
}
// tags returns the notmuch tags of a message
func (m *Message) tags() []string {
ts := m.msg.Tags()
var tags []string
var tag *notmuch.Tag
for ts.Next(&tag) {
tags = append(tags, tag.Value)
}
return tags
}
func (m *Message) modify(cb func(*notmuch.Message) error) error {
db, err := m.rwDB()
if err != nil {
return err
}
defer db.Close()
msg, err := db.FindMessage(m.key)
if err != nil {
return err
}
err = cb(msg)
if err != nil {
return err
}
// we need to explicitly close here, else we don't commit
dcerr := db.Close()
if dcerr != nil && err == nil {
err = dcerr
}
// next we need to refresh the notmuch msg, else we serve stale tags
rerr := m.refresh(m)
if rerr != nil && err == nil {
err = rerr
}
return err
}
func (m *Message) AddTag(tag string) error {
err := m.modify(func(msg *notmuch.Message) error {
return msg.AddTag(tag)
})
return err
}
func (m *Message) AddTags(tags []string) error {
err := m.modify(func(msg *notmuch.Message) error {
ierr := msg.Atomic(func(msg *notmuch.Message) {
for _, t := range tags {
msg.AddTag(t)
}
})
return ierr
})
return err
}
func (m *Message) RemoveTag(tag string) error {
err := m.modify(func(msg *notmuch.Message) error {
return msg.RemoveTag(tag)
})
return err
}
func (m *Message) RemoveTags(tags []string) error {
err := m.modify(func(msg *notmuch.Message) error {
ierr := msg.Atomic(func(msg *notmuch.Message) {
for _, t := range tags {
msg.RemoveTag(t)
}
})
return ierr
})
return err
}
func (m *Message) ModelFlags() ([]models.Flag, error) {
var flags []models.Flag
seen := true
for _, tag := range m.tags() {
switch tag {
case "replied":
flags = append(flags, models.AnsweredFlag)
case "flagged":
flags = append(flags, models.FlaggedFlag)
case "unread":
seen = false
default:
continue
}
}
if seen {
flags = append(flags, models.SeenFlag)
}
return flags, nil
}
func (m *Message) UID() uint32 {
return m.uid
}
|
